<div class="header">
  <!--Menu-->
    <menu></menu>
</div>
<!-- <div class="container text-center">
    <div class="row">
      <div class="col">
        Column
      </div>
      <div class="col">
        Column
      </div>
      <div class="col">
        Column
      </div>
    </div>
  </div>
  <button type="button" class="btn btn-primary">Primary</button>
<button type="button" class="btn btn-secondary">Secondary</button>
<button type="button" class="btn btn-success">Success</button>
<button type="button" class="btn btn-danger">Danger</button>
<button type="button" class="btn btn-warning">Warning</button>
<button type="button" class="btn btn-info">Info</button>
<button type="button" class="btn btn-light">Light</button>
<button type="button" class="btn btn-dark">Dark</button>

<button type="button" class="btn btn-link">Link</button> -->